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Finding the Fourth Proportional to 13,448.70, 18,557.78 and 7,479.41

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Solution

The fourth proportional to 13,448.70, 18,557.78 and 7,479.41 is: 10,320.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,448.70 : 18,557.78 = 7,479.41 : x
  2. Step 2: Convert to fraction form
    13,448.70/18,557.78 = 7,479.41/x
  3. Step 3: Cross multiply
    13,448.70x = 18,557.78 × 7,479.41
  4. Step 4: Simplify right side
    13,448.70x = 138,801,115.12
  5. Step 5: Solve for x
    x = 138,801,115.12/13,448.70
  6. Step 6: Final answer
    x = 10,320.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.